Putting money into the valiant, suggestions?

I agree with what Dan said. Basically, make sure it runs right, then look at upgrades.

IMO, Mopar put tires on these cars to keep them off the ground, not for driving enjoyment. Recommend going to a 6 or 7 inch wide rim with 4¼" back spacing (stock). Also recommend going to at least a 195/70 size tire to improve grip.

FWIW, both of my Darts were upgraded to BBP disk brakes and 15x7 wheels. The 73 has Magnum 500s with 205/60 tires, the 72 has cop car wheels with 235/60 tires.